Extract LDAP config to seperate class

lib/gitlab/ldap/config.rb

+# Load a specific server configuration
+module Gitlab
+  module LDAP
+    class Config
+      attr_accessor :provider, :options
+
+      def initialize(provider)
+        @provider = provider
+        @options = config_for(provider)
+      end
+
+      def enabled?
+        base_config.enabled
+      end
+
+      def adapter_options
+        {
+          host: options['host'],
+          port: options['port'],
+          encryption: encryption
+        }.tap do |options|
+          options.merge!(auth_options) if has_auth?
+        end
+      end
+
+      def sync_ssh_keys?
+        ssh_sync_key.present?
+      end
+
+      def ssh_sync_key
+        options['sync_ssh_keys']
+      end
+
+      def user_filter
+        options['user_filter']
+      end
+
+      def group_base
+        options['group_base']
+      end
+
+      def admin_group
+        options['admin_group']
+      end
+
+      protected
+      def base_config
+        Gitlab.config.ldap
+      end
+
+      def config_for(provider)
+        base_config.servers.find { |server| server.provider_name == provider }
+      end
+
+      def encryption
+        case options['method'].to_s
+        when 'ssl'
+          :simple_tls
+        when 'tls'
+          :start_tls
+        else
+          nil
+        end
+      end
+
+      def auth_options
+        {
+          auth: {
+            method: :simple,
+            username: options['bind_dn'],
+            password: options['password']
+          }
+        }
+      end
+
+      def has_auth?
+        options['password'] || options['bind_dn']
+      end
+    end
+  end
+end

spec/lib/gitlab/ldap/config_spec.rb

+require 'spec_helper'
+
+describe Gitlab::LDAP::Config do
+  let(:config) { Gitlab::LDAP::Config.new provider }
+  let(:provider) { 'ldapmain' }
+
+  describe :initalize do
+    it 'requires a provider' do
+      expect{ Gitlab::LDAP::Config.new }.to raise_error ArgumentError
+    end
+
+    it "works" do
+      expect(config).to be_a described_class
+    end
+  end
+end
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